Soundboard acoustic transducer

Patent metadata

Field	Value
Publication number	US-9508324-B2
Application number	US-201414161379-A
Country	US
Kind code	B2
Filing date	Jan 22, 2014
Priority date	Jan 22, 2013
Publication date	Nov 29, 2016
Grant date	Nov 29, 2016

Abstract

A soundboard acoustic transducer, including: a main body; and a vibrator configured to vibrate a soundboard in response to a sound signal input thereto, wherein the main body is supported by a member different from the soundboard, via a fixture formed by a metal plate.

First claim

What is claimed is:

1. A soundboard acoustic transducer, comprising:
a main body; and
a vibrator configured to vibrate a soundboard in response to a sound signal input thereto,
wherein the main body is supported by a member different from the soundboard, via a fixture formed by a metal plate,
wherein the fixture is configured to vibrate in a perpendicular direction with respect to a plate surface thereof in a frequency range at least from 4 kHz to 15 kHz,
wherein the fixture has a first plate portion fixed to the main body and a second flat plate portion fixed to the member,
wherein the first flat plate portion has at least one extending portion that is supported by the first flat plate portion and that extends in a substantially perpendicular direction with respect to the first flat plate portion, and
wherein each of the at least one extending portion is provided so as to be spaced apart from the second flat plate portion.

2. The soundboard acoustic transducer according to claim 1 , wherein the fixture is constructed to have an L-shaped cross-sectional shape.

3. The soundboard acoustic transducer according to claim 2 , wherein each of the at least one extending portion extends integrally from the first flat plate portion.

4. The soundboard acoustic transducer according to claim 2 , wherein a protrusion having one of a circular cross-sectional shape and an oval cross-sectional shape is provided on the first flat plate portion.

5. The soundboard acoustic transducer according to claim 1 ,
wherein the main body portion has a yoke and a magnet, and
wherein the vibrator has a bobbin around which a coil is wound.

6. The soundboard acoustic transducer according to claim 1 , wherein the second flat plate portion comprises a first end portion and a second end portion that is located at a position further from the soundboard than the first end portion,
wherein the first flat plate portion extends from the first end portion of the second flat plate portion in a direction perpendicular to the second flat plate portion,
wherein the first flat plate portion comprises a first surface and a second surface facing opposite each other, and
wherein the vibrator is fixed on the first surface, which is located at a position further from the soundboard than the second surface, of the first flat plate portion.

7. The soundboard acoustic transducer according to claim 6 , wherein the soundboard acoustic transducer is disposed below the soundboard,
wherein the first end portion of the second flat plate portion is above the second end portion, and
wherein the first surface of the first flat plate portion is below the second surface of the first flat plate portion.

Assignees

• Yamaha Corp

Inventors

• Ohnishi Kenta
• Takahashi Yuji

Classifications

• G10H2220/461

  Transducers, i.e. details, positioning or use of assemblies to detect and convert mechanical vibrations or mechanical strains into an electrical signal, e.g. audio, trigger or control signal · CPC title

• G10H2210/271

  Sympathetic resonance, i.e. adding harmonics simulating sympathetic resonance from other strings · CPC title

• G10H2230/011

  Hybrid piano, e.g. combined acoustic and electronic piano with complete hammer mechanism as well as key-action sensors coupled to an electronic sound generator · CPC title

• G10H3/22

  using electromechanically actuated vibrators with pick-up means (G10H3/24 takes precedence) · CPC title

• G10C3/06 Primary

  Resonating means, e.g. soundboards or resonant strings; Fastenings thereof · CPC title